Hi cduckyquack ,
SOURCE: HP Deskjet 5150 - top cover open
I had the same problem, and the cause turned out to be the cover switch not being fully pushed in. On the underside right edge of the top cover, there's a little triangular protrusion that pushes down a black rectangular button (the cover switch) when the cover is closed. The problem occurs because the flimsy top cover is made of plastic and flexes slightly when you close it. This means that sometimes, the right edge of the cover won't seat properly even though it appears as if the cover is closed all the way. When this happens, the triangular protrusion isn't fully pressing the switch down.
To test if this is this is happening, send a print job to the printer and wait for the "top cover is open" error message to appear. Next, open the top cover door and locate the cover switch. It's a little black button in a rectangular hole at the right edge of the doorway near the ink cartridges. Take a pen or a car key and use it to push the cover switch down. You can also use your fingertip to do this if it's skinny enough. If you keep the cover switch pressed down, the power button should start blinking to indicate a print job is coming through. If the print job actually starts printing, then you know the problem was the cover switch.
In my case, all I had to do the fix the problem was close the cover and make sure it was fully seated by firmly pressing down the right edge of the cover until I heard a plasticky "click" noise. After that, the problem went away.
Hope this helps.
SOURCE: hp deskjet5650
When closing the cover very slowly do you feel at the very bottom before it "closes" a slight resistance?You should have to push it down to finish the movement. Simply let the lid rest on your fingers and lower it into place, if there's no resistance just at dead bottom then the physical tab attached to the pegs of the cover may have broken off. The swich to "close lid" is probably internal by the lid joint.
Check to make sure the print carriage isn't snagged either. any little piece of anything can cause problems.
Good luck.
SOURCE: top cover open error when printing
I had the same problem and fixed it by sticking the end of a pen (the writing part) in the hole on the right side when you open the top cover.
In other words if you open the top cover and look on the top cover you will see a tab that goes into a hole(the hole is next to the picture of the print cartridges). There is a hole with switch/tab(I don't know the proper terminology) on it that is activated when you close the top cover. If you stick the end of a pen in that hole it should activate something and the print cartridges will start to make noise and move around. You can then close the cover and it should close all the way.
You can then try to print a test page.
Good Luck
SOURCE: HP 5850 Top Cover Open error message
There is a sensor that tells if the cover is open or closed, and a plactic "tongue" protruding on the cover, usually near the hinge, that goes into a recess in the printer.
Two things may have happened - this "tongue" broke off at some point, or the sensor developed a fault.
There are optical sensors, where the "tongue" blocks light going in between an emitter and a receiver, and simpe electrical contact sensors, which open or short when the "tongue" goes up.
There's not much that can be done with an optical sensor, but an electrical one can be inspected and corrected if needed, if you have some manual skills.
SOURCE: error message top cover open
just make sure the cover is proper and there is nothing stuck inside.
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